<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        Student.prototype.listen = function () {
            console.log('football');
        }
        function Student() {

        }
        Teacher.prototype.listen = function () {
            console.log('music');
        }
        function Teacher() {

        }

        var s1 = new Student();
        var t1 = new Teacher();

        function getPlay(o) {
            o.listen();
        }

        getPlay(s1);
        getPlay(t1);
    </script>
</body>

</html>